THE MAPLE LEAF, Train 20, has just arrived from Chicago. It is waiting in Durand while the last car is detached so that it can later be hooked to the rear of Detroit bound Train 56 which can be seen waiting for the diamond to clear. Since THE MAPLE LEAF goes all the way to Toronto, many of its passengers will be crossing the border. Consequently Customs and Immigration Officers will board the train and check out these people before reaching Sarnia, Ontario.